Arch Memory 4 GB (2 x 2 GB) 240-Pin DDR2 UDIMM for eMachines ET1331G-05w RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 4GB (2x2GB) 240-Pin DDR2 800Mhz SDRAM 4 GB Memory Kit (2 x 2 GB) for eMachines ET1331G-05w By Arch Memory 4 GB Memory Kit (2 x 2 GB) for eMachines ET1331G-05w By Arch Memory Lifetime Replacement Warranty